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| Kuznecov/Plaskin, Mathematics and Chess (Miodrag Petkovic), 1997. Código FEN: 8/7p/p6P/R7/8/2K5/8/1k6 w - - 0 1. |
Um problema diferente: imagine que o tabuleiro foi enrolado em um cilindro, de forma que as colunas "a" e "h" sejam adjacentes, e as peças possam se mover através dos limites verticais do tabuleiro. Como as Brancas podem dar xeque-mate em dois lances?
(A different problem: imagine that the board has been rolled into a cylinder, so that the a- and h-files are adjacent, and pieces can move across the boundary. How can White give checkmate in two moves?)
PCFilho
1-Rxa6 Kc1 2-Ra1#
ResponderExcluirRodrigo,
ResponderExcluir1. Rxa6 would lead to checkmate if this was a common chess problem, but here it fails, because Black can take the Rook with the Pawn, through the boundary!
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ResponderExcluir1 Ra5!! Kc1 2 Ra1#
ResponderExcluirSince the board is rolled into a cylinder, White can move his rook across the boundary between the a- and h-files, then across the board to stop on the square it left.
Well done, Jake!
ResponderExcluir1. Ra5!! is the key move here. The Rook tours the fifth rank and returns to its original square, forcing 1. … Kc1 2. Ra1#.
:)